L322 2003 . When I press the fold mirror button, both mirrors fold in and immediately return to the unfolded position.
I also tried the double tap a few times, nothing changed. any suggestions?

I believe that there are micro switches in the mirror that can cause the problem that your describing.... and they are repairable, I would suggest that try a search for door mirror fixes / repairs.... Also the X5 has the same mechanism as the 2002-2005 ffrr's, I'm sure that I found something on youtube years ago about how to fix them  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Seek and ye shall find....

http://www.fullfatrr.com/forum/topic36213....ror+switch 405 AB exec seats Baltic and Cirrus
93 RR Classic efi

Remember it's easier to get forgiveness than permission!

Gone in order:
4.4 TDV8 SE - gone to a good home
93 Classic hard dash Plymouth Blue
03 L322 Oslo Blue
2000 Disco TD5 ES Epsom Green
98 P38 Rioja Red
89 Classic Cairngorm Brown